JPWO2011108438A1 - Functional laminate, transparent conductive laminate for touch panel, and touch panel using the same - Google Patents

Functional laminate, transparent conductive laminate for touch panel, and touch panel using the same Download PDF

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JPWO2011108438A1
JPWO2011108438A1 JP2012503098A JP2012503098A JPWO2011108438A1 JP WO2011108438 A1 JPWO2011108438 A1 JP WO2011108438A1 JP 2012503098 A JP2012503098 A JP 2012503098A JP 2012503098 A JP2012503098 A JP 2012503098A JP WO2011108438 A1 JPWO2011108438 A1 JP WO2011108438A1
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layer
adhesive layer
functional
laminate
transparent
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JP5838152B2 (en
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栗嶋 進
進 栗嶋
聡史 根岸
聡史 根岸
長谷川 剛
剛 長谷川
隆行 相川
隆行 相川
幸史 高橋
幸史 高橋
牛尾 成次
成次 牛尾
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株式会社きもと
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Priority to JP2010047258 priority
Priority to JP2010047259 priority
Priority to PCT/JP2011/054151 priority patent/WO2011108438A1/en
Priority to JP2012503098A priority patent/JP5838152B2/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. single continuous surface or two parallel surfaces put in contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/10Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/20Inorganic coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/20Inorganic coating
    • B32B2255/205Metallic coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00Coating on the layer surface
    • B32B2255/26Polymeric coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/40Properties of the layers or laminate having particular optical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00Electrical equipment
    • B32B2457/20Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208Touch screens
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495Thickness [relative or absolute]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]

Abstract

Provided is a functional laminate that is flexible, firm, and has good die-cutting workability. The functional laminate is a laminate obtained by laminating at least two or more plastic films via an adhesive layer, and has a functional layer on at least one side or both sides of the plastic film, The adhesive layer has a Martens hardness of 260 N / mm 2 or less. The functional layer is, for example, a layer having an electromagnetic wave shielding function, a heat ray reflecting function, a gas barrier function, and a planar heat generating function, and can be provided inside the laminate. Alternatively, the functional layer is a layer having a light reflection function, a light transmission adjustment function, and an antifogging function, and can be provided on the outermost surface of the laminate. Moreover, a transparent conductive layer is formed on the transparent laminated board which bonded the transparent plastic film through the said adhesive layer, and it is set as the transparent conductive laminated board for touchscreens.

Description

  The present invention relates to a functional laminate, and more particularly, to a laminate capable of preventing a plastic film from being peeled off from an adhesive layer at the time of a die-cutting process. The present invention also relates to a transparent conductive laminated plate for a touch panel that is light and has no fear of breakage, and is excellent in processing (die-cutting) suitability, and a touch panel using the same.

  In recent years, various functional films such as an electromagnetic shielding film, a heat ray reflecting film, a gas barrier film, a light reflecting film, a light transmission adjusting film, and an antifogging film have appeared. Since these functional films are weak by themselves, they are used by being bonded to a reinforcing plate such as a plastic plate.

  However, a functional laminate with a functional film bonded to a plastic plate is thin and thick, lacks flexibility, and cracks during die cutting to achieve the desired size. There is a problem such as. The functional plastic plate in which the functional layer is directly formed on the plastic plate has the same problem.

  In order to avoid the above problems at the time of die-cutting, it is conceivable to attach a functional film or form a functional layer on a plastic plate having a predetermined size in advance, but in this case, the problem of poor workability There is.

On the other hand, in a capacitive touch panel and a resistive touch panel, an electrode in which a transparent conductive film is formed on a transparent substrate is used. A plastic film may be used as the transparent substrate, but glass is used when importance is attached to durability and waist.
However, when glass is used as the transparent substrate, there are problems that the weight is increased and the glass is scattered when broken. In order to solve this problem, it is conceivable to use a plastic plate having a sufficient thickness as the transparent substrate.

However, a transparent conductive laminate using a sufficiently thick plastic plate as a transparent substrate is sufficient, but lacks a feeling of pressing (touched touch) because it is too strong. There is a problem that it breaks during the die cutting process.
In this case as well, in order to avoid the above problems at the time of die-cutting, it is conceivable to form a transparent conductive layer on a transparent plastic plate previously formed in a predetermined size, but in this case, there is a problem that workability is poor. is there.

  The present applicant has proposed a technique relating to a laminated board in which two or more plastic films are bonded together via an adhesive layer as a material suitable for a surface protective film or the like (Patent Document 1). This laminated board has a characteristic that it is firm while keeping its thickness thin, and in order to solve the above-mentioned problems, it can be considered to be used as a base for forming a functional film or a transparent conductive layer.

WO2007 / 080774 (Claims)

  However, the laminate of Patent Document 1 may prevent the occurrence of cracking when performing the die cutting process, but may cause floating or peeling between the plastic film and the adhesive layer.

  Accordingly, the present invention provides a functional laminate that is thin, flexible, and strong, and does not float or peel between the plastic film and the adhesive layer even after performing a die-cutting process. An object of the present invention is to provide a transparent conductive laminate for a touch panel that is light but has a waist and a feeling of pressing (touched touch) and is not damaged during handling.

  The inventors of the present invention do not improve the floating or peeling between the plastic film and the adhesive layer, which occurs when the laminate is subjected to the die-cutting process, by simply improving the adhesion between the plastic film and the adhesive layer. The present inventors have found that the hardness of is related to the floating and peeling, and have completed the present invention.

That is, the present invention is a functional laminate comprising at least two plastic films bonded via an adhesive layer, and having a functional layer on at least one of the plastic films, wherein the martens of the adhesive layer The hardness is 260 N / mm 2 or less. In the present invention, the functional layer refers to a plastic film to be used, which is a physical function that the plastic film does not have, such as an optical function, an electrical function, a thermodynamic function, a heat ray or a gas shielding. It means a layer that provides functions such as functions.

A first aspect of the functional laminate of the present invention is a laminate obtained by bonding at least two or more plastic films via an adhesive layer, and at least one between the plastic film and the plastic film. A functional laminate comprising a functional layer, wherein the adhesive layer has a Martens hardness of 260 N / mm 2 or less.

The second aspect of the functional laminate of the present invention is a laminate obtained by bonding at least two plastic films via an adhesive layer, and functions on at least one surface of the outermost plastic film. A functional laminate having a layer, wherein the adhesive layer has a Martens hardness of 260 N / mm 2 or less.

A third aspect of the functional laminate of the present invention is a transparent conductive laminate for a touch panel. Specifically, at least two or more transparent plastic films are bonded with an adhesive layer having a Martens hardness of 260 N / mm 2 or less. A transparent conductive layer is provided on at least one surface of the laminated laminate to be bonded.

  In the functional laminate of the first aspect, the functional layer is a layer having a function selected from, for example, an electromagnetic wave shielding function, a heat ray reflecting function, a gas barrier function, and a planar heating function.

  In the functional laminate of the second aspect, the functional layer is a layer having a function selected from, for example, a light reflection function, a light transmission adjustment function, and an antifogging function.

  The functional laminate of the present invention is preferably characterized in that the combined thickness of the plastic film and the adhesive layer is 250 to 700 μm, and the thickness of each plastic film is 50 to 400 μm. .

  The functional laminate of the present invention is preferably characterized in that the resin constituting the adhesive layer contains a thermosetting resin or an ionizing radiation curable resin.

Furthermore, the touch panel of the present invention is characterized by using the above transparent conductive laminate for touch panel.
That is, the first aspect of the touch panel of the present invention includes a transparent conductive substrate having a transparent conductive layer on at least one side of a transparent substrate, and the transparent substrate is at least two transparent plastic films. A capacitive touch panel characterized by being a transparent laminated plate obtained by laminating an adhesive layer with an adhesive layer having a Martens hardness of 260 N / mm 2 or less.

In the second aspect of the touch panel of the present invention, an upper electrode having a transparent conductive layer on a transparent base material and a lower electrode having a transparent conductive layer on a transparent base material are transparent conductive layers. Are arranged through a spacer so that the transparent substrate of the upper electrode and / or the transparent substrate of the lower electrode has at least two plastic films with a Martens hardness of 260 N / mm 2 or less. It is a resistive film type touch panel, which is a transparent laminated plate bonded with an adhesive layer.

  The functional laminate of the present invention has a structure in which at least two or more plastic films are bonded together via an adhesive layer, so that the plastic film and the adhesive layer do not float or peel off, and the thickness is increased. While being thin, the laminate is strong and can be a laminate having excellent die-cutting properties. In addition, the functional laminate of the present invention is stronger than a single plastic film having the same thickness, and can prevent cracking during the die cutting process. The reason why the functional laminate can be made difficult to break is that the plastic film that constitutes the laminate can be used with a thickness that is easy to die-cut, and the adhesive layer absorbs the impact during die-cutting. It is done.

  The transparent conductive laminate for a touch panel of the present invention is light and has no fear of damage during handling. Thereby, although it is light, there is a waist and a feeling of pressing (touched touch), and a touch panel that does not cause glass scattering during handling can be provided.

Sectional drawing which shows one Example of the functional laminated sheet of the 1st aspect of this invention Sectional drawing which shows the other Example of the functional laminated sheet of the 1st aspect of this invention. Sectional drawing which shows the other Example of the functional laminated sheet of the 1st aspect of this invention. Sectional drawing which shows the other Example of the functional laminated sheet of the 1st aspect of this invention. Sectional drawing which shows one Example of the functional laminated sheet of the 2nd aspect of this invention Sectional drawing which shows the other Example of the functional laminated sheet of the 2nd aspect of this invention. Sectional drawing which shows the other Example of the functional laminated sheet of the 2nd aspect of this invention. Sectional drawing which shows one Example of the transparent conductive laminated board for touchscreens of this invention Sectional drawing which shows the other Example of the transparent conductive laminated board for touchscreens of this invention. Sectional drawing which shows the other Example of the transparent conductive laminated board for touchscreens of this invention. Sectional drawing which shows the Example of the electrostatic capacitance type touch panel (surface type) of this invention Sectional drawing which shows the Example of the capacitive touch panel (projection type) of this invention Sectional drawing which shows the Example of the resistive film type touch panel of this invention

Embodiments of the present invention will be described below.
The functional laminate of the present invention and the transparent conductive laminate for touch panel (hereinafter, collectively referred to as a functional laminate if not particularly distinguished) have at least two plastic films as an adhesive layer as a common structure. It has the laminated body structure bonded together. First, the material of the laminated body common to each embodiment and its structure will be described.

  As the plastic film, polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and various plastic films made of polyethylene, polypropylene, triacetyl cellulose, polyvinyl chloride, acrylic resin, and the like can be used. Of these, a polyethylene terephthalate film that has been stretched, particularly biaxially stretched, is preferred in that it has a strong waist and is difficult to break during die cutting. When three or more plastic films are used, it is preferable to use a biaxially stretched polyethylene terephthalate film on both surfaces and sandwich another plastic film. The surface of the plastic film may be subjected to an easy adhesion treatment such as a corona discharge treatment or an undercoat easy adhesion treatment.

  In the case where the functional laminate is a transparent conductive laminate for a touch panel or an application in which a functional layer is present inside the laminate and light transmittance is required, a plastic film having high transparency is used. In applications where transparency is not required due to the nature of the functional layer, the plastic film may not transmit light, and for example, a foam film or a white or black film may be used.

  The thickness of each plastic film is preferably 50 to 400 μm, more preferably 100 to 350 μm, and further preferably 150 to 300 μm. By setting the thickness of each plastic film in such a range, it is easy to perform the die-cutting process, and it is possible to easily prevent cracks during the die-cutting. In the transparent conductive laminate for a touch panel, a feeling of pressing can be improved. In order to prevent curling, when the functional laminate is made of two plastic films, it is preferable that the two plastic films have the same thickness, and the functional laminate has three or more plastic films. When it consists of, it is preferable to make the thickness of the two plastic films located in the surface side the same. For example, a thin plastic film having the same thickness can be bonded to both sides of a 400 μm plastic film.

  The combined thickness of the plastic film and adhesive layer of the functional laminate (thickness excluding the functional layer from the functional laminate) is preferably 200 μm to 1 mm, and the lower limit is more preferably 250 μm or more, and even more preferably 300 μm or more. is there. In the case of the functional laminate of the first and third aspects, it is particularly preferably 350 μm or more. By setting the thickness to 250 μm or more, the waist can be easily bent. The upper limit is preferably 700 μm or less. By setting the thickness to 1 mm or less, the die cutting process can be facilitated. In the transparent conductive laminate for touch panel, the waist strength can be moderated and the pressing feeling can be improved.

  An adhesive layer consists of resin and the additive added as needed. As the resin constituting the adhesive layer, a thermosetting resin or an ionizing radiation curable resin that is crosslinked and cured by heating and / or ionizing radiation irradiation or the like is preferably used. These resins increase the adhesion to the plastic film by crosslinking and curing, and can strengthen the waist of the functional laminate.

  Thermosetting resins can be crosslinked and cured by heat below the heat-resistant temperature of the plastic film because of the requirement in the manufacturing method that the coating liquid containing the thermosetting resin is applied on the plastic film and then crosslinked by heat. A thermosetting resin that can be used is preferable. Specifically, those obtained by crosslinking and curing a crosslinkable resin such as melamine type, epoxy type, amino alkyd type, urethane type, acrylic type, polyester type, phenol type and the like by heat can be used. In particular, an acrylic thermosetting resin that can strengthen the waist when used as a functional laminate and has good adhesion to a plastic film is preferable. These can be used alone, but it is desirable to add a curing agent in order to further improve the crosslinkability and the hardness of the crosslinked cured coating film. In the present invention, the thermosetting resin includes a room temperature curable resin that cures at room temperature (5-35 ° C.).

  As the curing agent, a compound such as polyisocyanate, amino resin, epoxy resin, carboxylic acid or the like can be appropriately used according to a suitable resin.

  As the ionizing radiation curable resin, it is preferable to use a resin formed from a paint that can be cross-linked and cured by irradiation with ionizing radiation (ultraviolet rays or electron beams). As such an ionizing radiation curable coating, one or a mixture of two or more of a photocationic polymerizable resin capable of photocationic polymerization, a photopolymerizable prepolymer or a photopolymerizable monomer capable of radical photopolymerization, and the like. Can be used. Various additives can be added to such an ionizing radiation curable coating. However, when ultraviolet rays are used for curing, it is preferable to add a photopolymerization initiator, an ultraviolet sensitizer, or the like.

  The adhesive layer may contain a thermoplastic resin such as an acrylic adhesive resin in addition to the curable resin described above. By mixing the thermoplastic resin, pressure-sensitive adhesiveness at room temperature can be imparted to the adhesive layer, so that the plastic films can be easily attached to each other. Further, by mixing the thermoplastic resin, the Martens hardness can be adjusted to be low, and when the die-cutting process is performed, it is difficult for floating or peeling between the plastic film and the adhesive layer. In order to obtain a strong functional laminate, the thermoplastic resin is preferably 60% or less of the resin constituting the adhesive layer.

  In the adhesive layer, additives such as leveling agents, ultraviolet absorbers, antioxidants, antistatic agents, pigments, dyes, etc. are added in addition to the above-mentioned resins within the range not impairing the function of the functional layer described later. May be. Further, another function may be imparted to the adhesive layer by adding an additive. For example, a function as a light diffusing plate or a function as a transmission screen can be imparted by including a light diffusing agent in the adhesive layer.

  The adhesive layer is cured by heating and / or irradiating the above-mentioned thermosetting resin or ionizing radiation curable coating with ionizing radiation. Curing here refers to the change from the state of a paint having fluidity at room temperature to the state of losing fluidity, and the degree of curing may vary. The degree of curing can be adjusted by the dose.

  The thickness of the adhesive layer after curing is preferably 1 to 50 μm. The lower limit of the adhesive layer is further preferably 2 μm or more, more preferably 5 μm or more, particularly preferably 10 μm or more, and the upper limit is further preferably 40 μm or less, more preferably 30 μm or less. By setting the thickness to 1 μm or more, sufficient waist and adhesive strength can be obtained. The reason why the thickness is 50 μm or less is that even if the thickness is 50 μm or more, the effect of strengthening the waist due to the thickness cannot be obtained so much and the thickness of the functional laminate becomes too thick. Moreover, since the irradiation amount of the ionizing radiation with respect to a plastic film increases by making the thickness of an adhesion layer thick, it will also cause deterioration of a plastic film.

The cured adhesive layer has a Martens hardness of 260 N / mm 2 or less, preferably 200 N / mm 2 or less, particularly preferably 100 N / mm 2 or less. Martens hardness represents the hardness (hardness of dent) of the adhesive layer obtained from the test load and the indentation surface area when the surface of the adhesive layer is pushed with a Vickers indenter, and is an index of the hardness of the adhesive layer. . In this specification, Martens hardness is the value measured by the method based on ISO-14477-1 in the atmosphere of temperature 20 degreeC and relative humidity 60%.

By setting the Martens hardness of the adhesive layer to 260 N / mm 2 or less, it is possible to prevent the floating or peeling between the plastic film and the functional layer and the adhesive layer when performing the die cutting process. The reason is that when the Martens hardness is greater than 260 N / mm 2 , a large force is required to cut the plastic film with a blade, and the repulsive force of the plastic film becomes too large. This is thought to be because floating or peeling occurs between the adhesive layer. The lower limit of the Martens hardness is preferably 1 N / mm 2 or more, more preferably 2 N / mm 2 or more. By setting the Martens hardness to 1 N / mm 2 or more, the strength of the waist can be maintained, and even when a partial pressure is applied to the laminated body, it is possible to prevent imprints from remaining.

As a method of setting the Martens hardness of the adhesive layer to 260 N / mm 2 or less, the blending of monomers and oligomers constituting the resin used in the adhesive layer, the blending of resins and additives used in the adhesive layer (resins having different Martens hardnesses) And the like, and the addition of thermoplastic resins). In particular, an acrylate monomer having a hydroxy group or an amino group is preferably used as the photopolymerizable monomer. Adhesive strength can be increased by using an acrylate monomer having a hydroxy group or an amino group, and Martens hardness can be adjusted by adjusting the amount thereof. Specific examples include hydroxy group acrylates such as hydroxyethyl acrylate, hydroxypropyl acrylate, 2-hydroxybutyl acrylate, and 4-hydroxybutyl acrylate, and hydroxy group methacrylates such as hydroxyethyl methacrylate, hydroxypropyl methacrylate, and 2-hydroxybutyl methacrylate. And acrylamide such as dimethylolacrylamide, dimethylaminopropyl acrylamide, diethyl acrylamide and hydroxyethyl acrylamide, and dimethylaminoethyl acrylate and acryloylmorpholine.

  In addition, as described above, the Martens hardness can be adjusted by adding a thermoplastic resin or by increasing or decreasing the irradiation amount of ionizing radiation when the adhesive layer is cured.

  Regarding the adhesive strength of the adhesive layer, it is preferable to have an appropriate adhesive strength that does not easily peel between the functional layer and the adhesive layer or between the plastic film and the adhesive layer after the adhesive layer is cured. In the case of easy peeling, the repulsive force of the plastic film causes floating or peeling when performing the die-cutting process, and the adhesive layer has an adhesive force even if it does not peel easily. This is because even small ones may float or peel off due to the repulsive force of the plastic film during die cutting. Specifically, the adhesive force between the plastic film or the functional layer and the adhesive layer is preferably 5 N / 25 mm width or more, and more preferably 10 N / 25 mm width or more. Moreover, it is more preferable that it is 15 N / 25 mm width or more which is difficult to peel off.

  The adhesive force can be adjusted by adjusting the type of monomer or oligomer constituting the resin used in the adhesive layer, or by adjusting the blending of the resin.

  The pencil hardness (JIS-K5600-5-4: 1999) of the adhesive layer is preferably HB or more from the viewpoint of waist.

  Next, a specific configuration of the functional layer will be described. In the following description, the functional layer is provided between the plastic film and the plastic film constituting the laminate (first embodiment), and is provided as the outermost surface layer of the laminate (second embodiment). ), And further described in order according to the configuration (third embodiment) of the transparent conductive laminate for touch panel.

<First embodiment>
The functional laminated board of 1st embodiment has a functional layer in at least one between a plastic film and a plastic film. Specific examples thereof are shown in FIGS. 1 and 2 show the case of two plastic films, and FIGS. 3 and 4 show the case of three plastic films. The position of the functional layer 13 in the laminate 1 varies depending on the purpose and forming method of the functional layer, but may be between the plastic film 11 and the adhesive layer 12 as shown in FIGS. 2 or between the adhesive layers 12 as shown in FIG. In the functional laminate of the present embodiment, since the functional layer is present inside the laminate, the functional layer can be prevented from being damaged and the durability can be improved.

  Examples of the functional layer of the present embodiment include a layer having a function selected from an electromagnetic wave shielding function, a heat ray reflecting function, a gas barrier function, and a planar heating function.

  The electromagnetic wave shielding functional layer can be formed by providing a conductive material in a lattice shape or by providing a conductive layer over one surface.

  The conductive grid pattern has a pitch of about 40 to 250 mesh [number of grids per inch (25.4 mm)], and the grid line width is preferably 100 μm or less, and more preferably the pitch is 50. ˜200 mesh, grid line width of 70 μm or less. If the pitch of the grid exceeds 250 mesh, the visible light transmittance tends to decrease, whereas if it is less than 40 mesh, the grid pattern tends to be noticeable. On the other hand, when the line width of the grating exceeds 100 μm, the grating tends to be easily noticeable.

  Conductive grid pattern is made by bonding conductive mesh to plastic film, applying / drying / curing conductive paste on plastic film, or forming metal in grid pattern by plating or etching. Etc. can be provided.

  The conductive layer can be provided by applying, drying and curing a conductive paste on a plastic film, bonding a metal foil to the plastic film, sputtering or vapor-depositing a metal or metal oxide on the plastic film, etc. . The conductive layer is preferably one in which metal layers and dielectric layers are alternately laminated, or one in which high refractive index material layers and low refractive index material layers are alternately laminated. Such a conductive layer can improve transparency.

  In addition, as a means for forming the electromagnetic wave shielding functional layer, there is a means for applying and drying a metal fine particle solution that self-assembles into a plastic film, and this means that an irregular mesh pattern can be formed. Can be prevented. As the metal fine particle solution that self-assembles, for example, a material described in JP-T-2008-546165 can be used.

  A heat ray reflective functional layer consists of a metal layer at least. Since a heat ray reflective functional layer can make transparency favorable, it is preferable to set it as the structure which laminated | stacked the dielectric material layer, the metal layer, and the dielectric material layer in order.

  The metal layer can be made of a metal such as gold, silver, copper, aluminum, nickel, palladium, tin or an alloy thereof, and in particular, a thin film using silver or an alloy thereof that hardly absorbs visible light. Is preferred. In addition, such a metal layer is formed using a vapor deposition method such as a vacuum deposition method, a sputtering method, an ion plating method, a thermal CVD method, a plasma CVD method, a photo CVD method, or a plating method. be able to.

  Dielectric layers include titanium oxide, tantalum oxide, zirconium oxide, zinc oxide, tin oxide, silicon oxide, indium oxide, titanium oxynitride, niobium oxide, indium tin oxide (ITO), titanium nitride, silicon oxynitride, silicon nitride, etc. These metal oxides and metal nitrides can be used. Such dielectric layers can be applied by vapor deposition methods such as vacuum deposition, sputtering, ion plating, thermal CVD, plasma CVD, and photo CVD, as well as coating methods such as sol-gel. Can be used to form a film.

  Examples of the gas barrier functional layer include an inorganic thin film or a resin layer.

  Examples of the inorganic substance constituting the inorganic thin film include inorganic substances such as silicon, aluminum, titanium, selenium, magnesium, barium, zinc, tin, indium, calcium, tantalum, zirconium, thorium, thallium and the like, or a single substance or a mixture of halides. Examples thereof include ceramics such as metal compounds and glass.

  Examples of organic substances constituting the resin layer include vinylidene chloride-vinyl chloride copolymer, vinylidene chloride-acrylonitrile copolymer, vinylidene chloride-acrylic copolymer, biaxially stretched polypropylene (OPP), unstretched polypropylene (CPP), and cyclic. Examples thereof include synthetic resins such as polyolefin, polychlorotrifluoroethylene (PCTFE), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA).

  Examples of the planar heat-generating functional layer include those in which a conductive circuit or a copper wire serving as a heating element is disposed, and a heat-generating layer in which conductive powder such as carbon is dispersed in a binder resin such as synthetic rubber.

  Electrodes are connected to the conductive circuit, copper wire, and heat generating layer that will be the planar heat generating functional layer, and the conductive circuit, copper wire, and heat generating layer are sandwiched between insulating layers such as plastic films and adhesive layers. . The conductive circuit can be formed by a known method such as etching after attaching a metal foil on a plastic film, depositing a metal, sputtering a metal, or printing a conductive paste.

  In addition to the functional layers described above, the functional laminate of the present embodiment may be provided with an outermost layer, a layer printed between the layers (printing layer), and other layers. The printed layer is formed for the purpose of hiding the structure existing on the lower side of the functional laminate or displaying necessary information depending on the application in which the functional laminate of the present embodiment is used. Yes, it may be printed directly on frames, characters, ruled lines, patterns, etc. on plastic film that constitutes the laminate, or printed on materials such as printable film, paper, etc. Good.

  The functional laminate of the present embodiment includes a plastic film provided with a functional layer and a plastic film bonded together via an adhesive layer, a plastic film provided with an adhesive layer and a functional layer in sequence, and a plastic film provided with an adhesive layer And a plastic film, a functional layer (when it can be handled alone) and a plastic film are bonded together via an adhesive layer. The adhesive layer can be formed by dissolving or dispersing the thermosetting resin or ionizing radiation curable resin components in an appropriate solvent to prepare a coating solution, or mixing the adhesive layer components without using a solvent. The coating solution is adjusted by adjusting the coating solution, and the coating solution is applied onto a plastic film by a known method such as a roll coating method, a bar coating method, a spray coating method, or an air knife coating method. Depending on the method, heating or ionizing radiation irradiation may be used. The irradiation amount of ionizing radiation is about 500 to 1500 mJ.

  The functional laminate of this embodiment can be die-cut into a desired shape depending on the application. The die cutting process can be performed by a conventionally known method using, for example, a die cutter using a Thomson blade die (Bik blade die).

  By performing the die-cutting process using a die-cutting machine in this way, multiple sheets and large areas can be processed simultaneously, and even if the thickness of the functional laminate is increased, the processing time is short, and laser cutting is performed. Compared with this, production efficiency can be improved. In addition, as described above, since the Martens hardness after curing has an adhesive layer in a specific range, the functional laminate is not broken at the time of die cutting, and the plastic No peeling or floating occurs at the interface between the film or functional layer and the adhesive layer.

  The functional laminate of this embodiment can be used as a surface protection plate for liquid crystal display devices, plasma display devices, EL display devices and the like when the functional layer has an electromagnetic wave shielding function. Further, when the functional layer has a heat ray reflecting function, it can be used by being fitted into a frame (for example, a screen door frame) and installed on a window rail. When the functional layer has a gas barrier function, it can be assembled into a box shape and used as a gas barrier case. Further, when the functional layer has a planar heating function, it can be fitted into a frame and used as a thin heater.

<Second Embodiment>
The functional laminate of the second embodiment has a functional layer on at least one surface of the outermost plastic film. Examples thereof are shown in FIGS. 5 and 6 show a case where the functional layer 13 is provided on one outermost surface of the functional laminate 1, and FIG. 7 shows a case where both the outermost surfaces of the functional laminate 1 are provided. In addition to the functional layer 13 provided on the outermost surface, the functional layer 13 may be provided inside the laminate as shown in FIG. 5 to 7 show a laminated plate composed of two plastic films 11, but as shown in FIGS. 3 and 4 shown in the first embodiment, three laminated plates or It is also possible to configure with a plastic film larger than that. It is also possible to adhere the functional layer to the uppermost plastic film via the adhesive layer 12.

  Examples of the functional layer of the present embodiment include a layer having a function selected from a light reflection function, a light transmission adjustment function, and an antifogging function.

  The light reflection functional layer may be any layer that can reflect light (including infrared rays), and examples thereof include a white layer and a metal thin film layer.

  As the white layer, a foamed white film, a white resin layer to which a white pigment such as titanium dioxide or barium sulfate is added can be used.

  The metal thin film layer is laminated by a physical vapor deposition method (PVD). For example, a metal such as silver or aluminum that can be formed by a vacuum vapor deposition method, an ion plating method, a sputtering method, an ion beam vapor deposition method, or the like. A thin film or the like can be used. The thickness of the metal thin film layer is preferably 50 nm or more and 1000 nm or less, and more preferably 80 nm or more and 300 nm or less.

  In addition, other similar light reflecting functional layers and other functional layers are provided on the surface on which the light reflecting functional layer is not provided (the surface on which the adhesive layer is provided or one surface of another plastic film). be able to. For example, in order to further reflect light that has not been reflected by the light reflecting function layer, a light reflecting function layer is provided, or in order to absorb light that is not reflected by the light reflecting function layer, black or the like can be used. A colored resin layer can also be provided. Further, by providing a light diffusing function on another surface, it can be used as a reflective screen.

  Further, by combining the light reflection preventing functional layer and the light reflecting functional layer, it is possible to transmit visible light and reflect infrared light.

  The light reflection preventing functional layer may be any layer that can prevent light reflection, and examples thereof include a refractive index adjusting layer and a concavo-convex imparting layer.

  The refractive index adjustment layer is a multi-layered film with different refractive indexes or a single layer film with a low refractive index or a high refractive index, and reflects light reflected at the interface of air, plastic film, refractive index adjustment layer, etc. It is a layer for preventing or reducing the occurrence.

  As such a refractive index adjustment layer, a binder resin is appropriately selected, a resin layer obtained by adding a pigment to the binder resin, a metal thin film layer, or the like can be used.

  Examples of the pigment that adjusts the refractive index include silicon oxide, aluminum oxide, antimony oxide, tin oxide, titanium oxide, zirconium oxide, and tantalum oxide. The average particle diameter of the pigment is preferably 0.1 μm or less. By setting the average particle size to 0.1 μm or less, irregular reflection of light from the refractive index adjusting layer can be prevented, and a decrease in transparency can be prevented.

  Metals used for the refractive index adjustment layer include metal oxides such as titanium oxide, tantalum oxide, zirconium oxide, zinc oxide, tin oxide, silicon oxide, indium oxide, titanium oxynitride, titanium nitride, silicon oxynitride, and silicon nitride. Alternatively, metal nitride can be used. Such a metal thin film can be provided in the same manner as the metal thin film layer of the light reflection functional layer.

  By providing the unevenness providing layer on the outermost surface of the functional laminate, reflection of the plastic film surface can be prevented. Such an uneven | corrugated provision layer can be provided by forming with a binder resin and a pigment, or giving a blasting process etc. to a plastic film.

  The anti-fogging functional layer is a layer for preventing fogging due to water droplets. Examples of such an antifogging functional layer include a hydrophilic layer and a water repellent layer.

  It is preferable to use a hydrophilic polymer for the hydrophilic layer. The main chain structure of the hydrophilic polymer is not particularly limited. Preferred main chain structures include acrylic resin, methacrylic resin, polyvinyl acetal resin, polyurethane resin, polyurea resin, polyimide resin, polyamide resin, epoxy resin, polystyrene resin, novolac type phenol resin, polyester resin, cellulose, amylose, Examples include natural cyclic polymer resins such as chitosan, synthetic rubber, natural rubber and the like, and acrylic resin and methacrylic resin are particularly preferable. The hydrophilic polymer may be a copolymer.

  The hydrophilic group is preferably a carboxyl group, an alkali metal salt of a carboxyl group, a sulfonic acid group, an alkali metal salt of a sulfonic acid group, a hydroxyl group, an amide group, a carbamoyl group, a sulfonamide group, a sulfamoyl group, or a functional group. can give. These groups may be present at any position in the polymer. A polymer structure in which a plurality of polymers are bonded directly from a polymer main chain or via a linking group, or bonded to a polymer side chain or a graft side chain, is preferred.

  The hydrophilic layer is made of anatase-type titanium oxide, rutile-type titanium oxide, brookite-type titanium oxide, zinc oxide, tin oxide, ferric oxide, dibismuth trioxide, tungsten trioxide having a photocatalytic function in an inorganic binder, What mixed strontium titanate etc. may be used.

  The contact angle of such a hydrophilic layer with respect to water is preferably 20 ° or less. Moreover, it is preferable to give an unevenness | corrugation to the hydrophilic layer surface. By setting it as such a hydrophilic layer, even when a water droplet adheres to the surface, since a water droplet spreads instantly, an anti-fogging effect can be exhibited.

  For the water repellent layer, acrylic resin, epoxy resin, silicone resin, fluorine resin, etc. can be used. As the hydrophobic group, phenyl group, alkyl group, fluoroalkyl group, acetoxy group, oxime group, methoxy group Amide group, propenoxy group, methyl group and the like.

  The contact angle of the water repellent layer with respect to water is preferably 90 ° or more. By setting it as such a water-repellent layer, even when a water droplet adheres, since a water droplet flows down, the anti-fogging effect can be exhibited.

  The anti-fogging functional layer may have a laminated structure of a hydrophilic layer and a porous water repellent layer. By providing a porous water-repellent layer on the hydrophilic layer in this way, the hydrophilic layer is positioned on the outermost surface even when the hydrophilic layer contains water and adhesiveness is expressed on the surface of the hydrophilic layer. Therefore, when there is no problem due to adhesiveness, or when water droplets adhere to the surface of the water repellent layer, the water droplets can easily permeate from the pores of the water repellent layer into the hydrophilic layer, and the water droplets remain on the surface of the antifogging functional layer. Therefore, the antifogging effect is improved.

  Similarly to the first embodiment, the functional laminate of this embodiment may be provided with an outermost layer, a layer printed between the layers (printing layer), and other layers.

  The laminated board of this embodiment is produced by laminating at least two plastic films via an adhesive layer. For example, an adhesive layer is formed on one plastic film, the other plastic film is bonded to the coated surface, and then the adhesive layer is cured by heating or irradiation with ionizing radiation. As a method for forming the adhesive layer, the same method as in the first embodiment can be employed.

  For the functional layer, as with the contact layer, a coating solution containing the material constituting the functional layer is applied onto a plastic film by a known method such as a roll coating method, a bar coating method, a spray coating method, or an air knife coating method. Depending on the condition, it can be formed by heating or irradiation with ionizing radiation. In these functional layers, additives such as a leveling agent, an ultraviolet absorber and an antioxidant may be added.

  The laminated plate of this embodiment is a material suitable for the surface protection plate of the display device, but can also be used for applications other than the surface protection plate, and can be die-cut into a desired shape depending on the application. .

  Similarly to the first embodiment, the die cutting process can be performed by a conventionally known method using, for example, a die cutter using a Thomson blade die (Bik blade die), and the same effect can be obtained.

  The functional laminate of the present embodiment can be used as a surface protective plate for liquid crystal display devices, plasma display devices, EL display devices and the like when the functional layer has a light reflection function and a light transmission adjustment function. Moreover, when it is set as a metal thin film layer as a light reflection functional layer, it can also be used as a mirror which does not break. Further, when the functional layer has an anti-fogging function, it can be used by being fitted into a frame (for example, a screen door frame) and installed on a window rail. Moreover, it can be assembled into a machine box and used as an anti-fogging case.

<Third embodiment>
The third embodiment is a transparent conductive laminate for a touch panel, and a transparent conductive layer is provided on at least one surface of the transparent laminate. Specific examples thereof are shown in FIGS.

  FIG. 8 shows a transparent conductive laminate 6 for a touch panel having a transparent conductive layer 2 on one surface of the transparent laminate 10. The upper electrode or the lower electrode of the resistive touch panel or the surface type capacitive touch panel is shown. It can be used as a member. FIG. 9 shows a transparent conductive laminate 6 for a touch panel having a transparent conductive layer 2 on both sides of a transparent laminate 10, a projection type capacitive touch panel, or a surface type capacitive type having an electromagnetic shielding function. It can be used as a touch panel. FIG. 10 shows a transparent conductive laminate 6 for a touch panel having two transparent conductive layers 2 on one side of the transparent laminate 10 with an insulating layer 3 interposed therebetween, and can be used as a projected capacitive touch panel. .

  For the transparent conductive layer, generally known transparent conductive materials can be used. For example, a transparent conductive material such as indium oxide, tin oxide, indium tin oxide (ITO), gold, silver, or palladium can be used. These can be formed on one side or both sides of the laminate by a vacuum deposition method, a sputtering method, an ion plating method, a solution coating method, or the like. Further, it is possible to form a transparent conductive layer using an organic conductive material.

  Although the thickness of the transparent conductive layer varies depending on the material to be applied and cannot be generally specified, it has a surface resistivity of 1000Ω or less, preferably 500Ω or less. In consideration of economic efficiency, a range of 10 nm or more, preferably 20 nm or more and 80 nm or less, preferably 70 nm or less is suitable.

  The transparent conductive layer forms a pattern by etching or the like as necessary. For example, in the case of a transparent conductive laminate for a projected capacitive touch panel shown in FIGS. 9 and 10, one transparent conductive layer is formed from an X electrode that recognizes the X coordinate, and the other transparent conductive layer is It is formed from a Y electrode that recognizes the Y coordinate. Further, in the case of a transparent conductive laminate for a multi-touch type resistive touch panel, the conductive layer is formed in a long and narrow strip shape with an interval. When incorporated in the touch panel, the strip directions of the upper electrode and the lower electrode are arranged so as to be orthogonal.

  In addition, it is preferable to have a refractive index adjustment layer between a plastic film and a transparent conductive layer. In the case of a projected capacitive touch panel and a multi-touch resistive touch panel, a refractive index adjustment layer formed of a material close to the refractive index of the material constituting the electrode between the plastic film and the transparent conductive layer. By providing the electrode pattern, the electrode pattern can be made inconspicuous. As the refractive index adjustment layer, the materials described in the second embodiment can be used.

  The transparent conductive laminate for a touch panel of the present invention is produced by bonding at least two plastic films through an adhesive layer. For example, an adhesive layer is formed on one plastic film, the other plastic film is bonded to the coated surface, and then the adhesive layer is cured by heating or irradiation with ionizing radiation. As a method for forming the adhesive layer, the same method as in the first and second embodiments can be adopted. The timing for forming the transparent conductive layer may be before or after the plastic films are bonded together.

  The transparent conductive laminate for a touch panel preferably has a hard coat layer between the side having no transparent conductive layer or between the plastic film and the transparent conductive layer. By having a hard coat layer, it is possible to further strengthen the waist and make it difficult to scratch. The hard coat layer is preferably formed from a thermosetting resin or an ionizing radiation curable resin, and the thickness is preferably 2 to 15 μm from the viewpoint of die cutting treatment.

  In the case of a capacitive touch panel, it is preferable to form a protective film on the transparent conductive layer from the viewpoint of preventing damage. Examples of the protective film include an inorganic thin film formed by sputtering an inorganic oxide such as silica. Such an inorganic thin film can also be used as the insulating layer 3 shown in FIG.

  Similarly to the first and second embodiments, the transparent conductive laminate for touch panel of the present embodiment can be die-cut into a desired shape according to the application, and the same effect can be obtained. That is, there is no cracking at the time of punching, and no peeling or floating occurs at the interface between the plastic film and the adhesive layer.

  Next, an embodiment of the touch panel of the present invention will be described. The touch panel of the present invention is characterized by using the above-described transparent conductive laminate for a touch panel. Main touch panels include a capacitive touch panel and a resistive touch panel, and the present invention can be applied to both. Depending on the type of touch panel, an appropriate transparent conductive laminate is selected and used. Hereinafter, each type of touch panel will be described.

  The capacitive touch panel can be classified into a surface type (Projected Capacitive) and a projected type (Projected Capacitive).

  An embodiment of the surface-type capacitive touch panel 20 is shown in FIG. In the illustrated touch panel, a transparent conductive laminate 6 having a transparent conductive layer 2 and a protective layer 4 on one surface of a transparent substrate (transparent laminate) 10 and an electromagnetic wave shielding layer 5 on the other surface. Is connected to the basic circuit. The transparent substrate 10 is a transparent laminated plate in which two plastic films 11 are laminated via an adhesive layer 12.

  The basic circuit is generally a constant voltage circuit that uses a sine wave as a drive signal and allows a very weak current to flow through the transparent conductive layer simultaneously at the four corners. When a person is not touching, the panel has almost the same potential at the four corners, so that almost no current flows through the panel. The amount of current change at that time is inversely proportional to the distance from the four corners to the touch point. Then, the current is converted into voltage to determine the coordinates.

  An embodiment of the configuration of the projected capacitive touch panel 20 is shown in FIG. The illustrated touch panel has a configuration in which the transparent conductive layer 2 and the protective layer 4 are provided on one surface of the transparent substrate 10 and the transparent conductive layer 2, the lead electrode wire 7 and the protective layer 4 are provided on the other surface. . The transparent substrate 10 is a transparent laminated plate in which two plastic films 11 are laminated via an adhesive layer 12. In the capacitive touch panel 20 of FIG. 12, the transparent conductive laminate 6 can be changed to the transparent conductive laminate 6 shown in FIG. 9 or FIG.

  In the projected capacitive touch panel, one transparent conductive layer is formed from an X electrode that recognizes an X coordinate, and the other transparent conductive layer is formed from a Y electrode that recognizes a Y coordinate. The coordinates of the touch point are determined by detecting a voltage change between the XY electrodes generated by the approach of the finger.

  The resistive film type touch panel is arranged via a spacer so that the transparent conductive layers of the upper electrode and the lower electrode having a transparent conductive layer on a transparent substrate are opposed to each other.

  An embodiment of the configuration of the resistive touch panel 20 is shown in FIG. The illustrated touch panel includes a transparent conductive layer 2 on one surface of the transparent substrate 10, an upper electrode having the hard coat layer 9 on the other surface, and a lower electrode having the transparent conductive layer 2 on one surface of the transparent substrate 10. Are arranged via a spacer 8 so that the transparent conductive layers 2 of the upper electrode and the lower electrode face each other.

  In the resistive touch panel, the coordinates of the touch point are determined according to the voltage value when the upper electrode and the lower electrode of the touch point are in contact with each other and energized. In the case of a multi-touch type resistive touch panel, the strip directions of the upper electrode and the lower electrode are arranged to be orthogonal to each other.

The structure of the touch panel of the present invention described above is the same as that of a conventional capacitive or resistive touch panel. However, at least two transparent plastic films as the transparent base material have a Martens hardness of 260 N / mm. By using a transparent laminate laminated with two or less adhesive layers, the touch panel has a low waist and a feeling of pressing (touched feeling), and is free from the risk of glass scattering during handling.

  The following examples further illustrate the present invention. “Parts” and “%” are based on weight unless otherwise specified.

1. Functional laminate (first aspect)
[Example 1]
On one surface of a transparent polyester film A (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm, a titanium oxide layer (dielectric layer: first layer) having a thickness of 15 nm is provided, and a silver layer (metal) having a thickness of 12 nm is formed thereon. Layer: second layer), and a titanium oxide layer (dielectric layer: third layer) having a thickness of 25 nm was further provided thereon to form a heat ray reflective layer. The above three layers were all formed by a sputtering method under vacuum (5 × 100 −5 torr). Moreover, since the said heat ray reflective layer has a silver layer, it had an electromagnetic wave shielding function.

  Next, on the surface of the polyester film A opposite to the heat ray reflective layer, a hard coat layer coating solution having the following composition is applied by a bar coating method so as to have a thickness of 5 μm, irradiated with ultraviolet rays, and heat ray reflected. A transparent polyester film having a layer and a hard coat layer was produced.

<Hard coat layer coating solution>
・ 58 parts of ionizing radiation curable resin (Diabeam UR6530: Mitsubishi Rayon)
・ 1.8 parts of photopolymerization initiator (Irgacure 651: Ciba Japan)
・ Methyl ethyl ketone 80 parts ・ Toluene 60 parts ・ Ethyl cellosolve 7 parts

  Next, an adhesive layer coating solution S1 having the following composition was applied on the heat ray reflective layer of the transparent polyester film A by a bar coating method so as to have a thickness of 10 μm. Next, a transparent poster film B (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm was bonded onto the adhesive layer, and irradiated with ultraviolet rays to produce the functional laminate of Example 1.

<Adhesive layer coating solution S1>
・ Ionizing radiation curable resin 60 parts (NK Oligo U-200PA: Shin-Nakamura Chemical Co., Ltd.)
・ Hydroxyethyl methacrylate 35 parts ・ 2-hydroxyethyl acrylate 5 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 2]
A functional laminate of Example 2 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S2.
<Adhesive layer coating solution S2>
・ Ionizing radiation curable resin 30 parts (NK Oligo U-200PA: Shin-Nakamura Chemical Co., Ltd.)
・ Ionizing radiation curable resin 30 parts (Aronix M-6100: Toagosei Co., Ltd.)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 3]
A functional laminate of Example 3 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S3.
<Adhesive layer coating solution S3>
・ Ionizing radiation curable resin 30 parts (KAYARAD R-115: Nippon Kayaku)
・ Ionizing radiation curable resin 30 parts (Aronix M-6100: Toagosei Co., Ltd.)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 4]
A functional laminate of Example 4 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S4.
<Adhesive layer coating solution S4>
・ Ionizing radiation curable resin 60 parts (KAYARAD R-115: Nippon Kayaku)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 5]
A functional laminate of Example 5 was produced in the same manner as in Example 1 except that the transparent polyester film A and the transparent polyester film B were both changed to a polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.). .

[Example 6]
A functional laminate of Example 6 was produced in the same manner as in Example 1 except that the transparent polyester film A and the transparent polyester film B were both changed to a 100 μm thick polyester film (Cosmo Shine A4300: Toyobo Co., Ltd.). .

[Example 7]
A polyester film having a heat ray reflective layer and a hard coat layer was produced in the same manner as in Example 1 using a transparent polyester film C (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm instead of the transparent polyester film A. Next, the same adhesive layer coating solution S1 as in Example 1 was applied to one surface of the heat ray reflective layer side of the polyester film and a transparent polyester film D (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm, respectively. It was applied by a bar coating method so as to have a thickness of 10 μm, and two adhesive films were obtained. Subsequently, the obtained two adhesive films and a transparent polyester film E (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm were combined with a hard coat layer / film C / heat ray reflective layer / adhesive layer / film D / adhesive layer. / The film was laminated so as to be film E, and the adhesive layer was cured by irradiating with ultraviolet rays to prepare the functional laminate of Example 7.

[Example 8]
A functional laminate of Example 8 was produced in the same manner as in Example 7 except that the transparent polyester film D was changed to a transparent polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

[Example 9]
The functional layered laminate of Example 9 was used in the same manner as in Example 1 except that the adhesive layer coating solution was replaced with the following adhesive layer coating solution S5, the adhesive layer coating solution was applied and dried, and then bonded and UV-irradiated. A plate was made.
<Adhesive layer coating solution S5>
・ 90 parts of thermosetting resin (Takelac A-606: Mitsui Chemicals)
・ 10 parts of curing agent (Takenate A-50: Mitsui Chemicals)
・ Diluted solvent 146 parts

[Comparative Example 1]
A functional laminate of Comparative Example 1 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S6.
<Adhesive layer coating solution S6>
・ Ionizing radiation curable resin 50 parts (KAYARAD R-115: Nippon Kayaku)
・ Ionizing radiation curable resin 30 parts (NK Ester A-TMM-3N: Shin-Nakamura Chemical Co., Ltd.)
・ 20 parts of photopolymerizable monomer (ACMO: Kojinsha)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 2]
A functional laminate of Comparative Example 2 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S7.
<Adhesive layer coating solution S7>
・ Ionizing radiation curable resin 100 parts (NK Oligo U-15HA: Shin-Nakamura Chemical Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 3]
A functional laminate of Comparative Example 3 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S8.
<Adhesive layer coating solution S8>
・ Ionizing radiation curable resin 100 parts (NK Ester A-TMM-3N: Shin-Nakamura Chemical Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 4]
A functional laminate of Comparative Example 4 was produced in the same manner as in Example 1 except that the adhesive layer coating solution was changed to the following intermediate layer coating solution S9.
<Intermediate layer coating solution S9>
・ 90 parts of ionizing radiation curable resin (NK Oligo U15-HA: Shin-Nakamura Chemical Co., Ltd.)
・ Butyl acrylate 10 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 5]
A titanium oxide layer (dielectric layer: first layer) having a thickness of 15 nm is provided on one surface of a transparent polyester film (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm, and a silver layer (metal layer) having a thickness of 12 nm is formed thereon. : A second layer), and a titanium oxide layer (dielectric layer: third layer) having a thickness of 25 nm was further provided thereon to form a heat ray reflective layer. Note that all the three layers were formed by sputtering under vacuum (5 × 10 −5 torr). Next, a hard coat layer coating solution having the following composition is applied to the surface opposite to the heat ray reflective layer by a bar coating method so as to have a thickness of 5 μm, and irradiated with ultraviolet rays. Was made.
<Hard coat layer coating solution>
・ 58 parts of ionizing radiation curable resin (Diabeam UR6530: Mitsubishi Rayon)
・ 1.8 parts of photopolymerization initiator (Irgacure 651 Ciba Japan)
・ Methyl ethyl ketone 80 parts ・ Toluene 60 parts ・ Ethyl cellosolve 7 parts

[Comparative Example 6]
A functional film of Comparative Example 6 was produced in the same manner as Comparative Example 5 except that the transparent polyester film was changed to a transparent polyester film having a thickness of 188 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

(1) Martens hardness The adhesive layer coating liquids S1 to S9 of Examples 1 to 9 and Comparative Examples 1 to 4 are applied to a transparent polyester film F (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm so that the thickness becomes 10 μm. Was applied by a bar coating method. A release film is bonded onto the adhesive layer, irradiated with ultraviolet rays (irradiation amount: 1000 mJ), the adhesive layer is cured, the release film is peeled off from the adhesive layer, and the hardness of the surface of the adhesive layer after curing is cured. Is measured by an ultra-micro hardness tester (trade name: Fischer Scope HM2000, Fischer Instruments Co., Ltd.) in an atmosphere at a temperature of 20 ° C. and a relative humidity of 60% by a method based on ISO-14477-1. did. However, the maximum test load is a value measured at 1 mN. The results are shown in Table 1.

  The functional laminates and functional films obtained in Examples 1 to 9 and Comparative Examples 1 to 6 were measured and evaluated for the following items. The results are shown in Table 1.

(2) Processability (peeling / floating)
Die-cutting with a die-cutting machine (manual press machine, model: Torque pack press TP series, Amada Co., Ltd.), where no peeling or lifting occurred. × ”.

(3) Adhesive The polyester film having the hard coat layer of the functional laminate and the other members constituting the laminate are peeled left and right at a peel rate of 100 mm / min in the same manner as in the T-type peel test. It was measured. The case where the force required for peeling was 10 N / 2 mm width or more was indicated as “◯”, and the case where the force required for peeling was less than 10 N / 2 mm width was indicated as “X”.

(4) Waist “◎” indicates that the finger does not bend when touched, “◯” indicates that the finger is slightly bent when touched, and “x” indicates that the finger bends greatly when touched.

In addition, the thickness of the laminated board shown to the table | surface has shown the thickness as a base material which does not include the thickness of a hard-coat layer or another functional layer (the same is true of Table 2 and Table 3).

As is clear from the above results, the functional laminates of Examples 1 to 9 have a Martens hardness of 260 N / mm 2 or less, and therefore prevent floating and peeling when performing a die cutting process. I was able to. In particular, in the functional laminates of Examples 1 to 5 and Example 9, the thickness of the plastic film + adhesive layer was in the range of 250 μm to 700 μm, and the waist was sufficient.

  In the functional laminate of Example 1, the adhesive strength of the adhesive layer was 15 N / 25 mm width or more. For this reason, after performing the die cutting process, the two plastic films cannot be peeled off and are particularly firmly bonded.

  In the functional laminate of Example 6, the thickness of the plastic film + adhesive layer is thinner than that of Example 1. Since the total thickness (210 μm) is relatively thin, the functional laminate of Example 6 was slightly bent when touched with a finger, but the strength of the waist was one piece of plastic thicker than that (Comparative Example) 5: 250 μm), indicating that it is stronger than one plastic film having the same thickness.

  In the functional laminates of Examples 7 to 8, the thickness of the plastic film + adhesive layer is thicker than that of Example 1. Because of the thick thickness, the waist was very sufficient. However, since the total thickness was thick, a large force was required for die cutting as compared with the functional laminates of Examples 1 to 6.

On the other hand, since the functional laminates of Comparative Examples 1 to 3 had a Martens hardness larger than 260 N / mm 2 , floating or peeling occurred when the die cutting process was performed.

In the functional laminate of Comparative Example 4, the Martens hardness of the intermediate layer provided instead of the adhesive layer was larger than 260 N / mm 2 , and the adhesive strength of the two plastic films was less than 10 N / 25 mm width. For this reason, since the adhesiveness between the plastic film and the adhesive layer was poor and the plastic film was easily peeled off, the repulsive force of the plastic film could not be suppressed during the punching process, and floating or peeling occurred.

  The functional films of Comparative Examples 5 to 6 are obtained by providing a heat ray reflective layer and a hard coat layer on one plastic film. Since two or more plastic films were not laminated and the thickness of the plastic film was thin, sufficient waist was not obtained.

  Even when other functional layers (an electromagnetic wave shielding layer, a gas barrier layer, and a planar heating layer) were provided in place of the heat ray reflective layer, the same results as in the above-described Examples and Comparative Examples were obtained.

2. Functional laminate (second embodiment)
[Example 10] (Antireflection layer: LR)
On one surface of a transparent polyester film A having a thickness of 188 μm (Cosmo Shine A4300: Toyobo Co., Ltd.), an antireflection layer coating liquid having the following composition is dried to a thickness of 0.1 μm by the bar coater method. And dried to form an antireflection layer having a refractive index of 1.38, and a transparent polyester film having an antireflection layer was produced.

<Antireflection layer coating solution>
・ Silica sol 200 parts ・ Porous silica fine particle dispersion 100 parts (silica component: 5%, average particle size: 55 nm)
・ Isopropanol 350 parts ・ n-butanol 350 parts

  Next, a hard coat layer coating solution having the following composition was applied on one surface of a transparent polyester film B (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm by a bar coating method so as to have a thickness of 5 μm. Irradiated to produce a transparent polyester film having a hard coat layer.

<Hard coat layer coating solution>
・ 58 parts of ionizing radiation curable resin (Diabeam UR6530: Mitsubishi Rayon)
・ 1.8 parts of photopolymerization initiator (Irgacure 651: Ciba Japan)
・ Methyl ethyl ketone 80 parts ・ Toluene 60 parts ・ Ethyl cellosolve 7 parts

  Next, an adhesive layer coating solution S1 having the following composition was applied to the surface opposite to the antireflection layer of the transparent polyester film A by a bar coating method so as to have a thickness of 10 μm. Subsequently, the surface opposite to the hard coat layer of the transparent polyester film having the hard coat layer on the adhesive layer was bonded and irradiated with ultraviolet rays to produce the functional laminate of Example 10.

<Adhesive layer coating solution S1>
・ Ionizing radiation curable resin 60 parts (NK Oligo U-200PA: Shin-Nakamura Chemical Co., Ltd.)
・ Hydroxyethyl methacrylate 35 parts ・ 2-hydroxyethyl acrylate 5 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 11] (Light reflection functional layer / coating)
An adhesive layer coating solution S2 having the following composition was applied to both sides of a transparent polyester film A (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm by a bar coating method so as to have a thickness of 10 μm. A 75 μm foam white polyester film B (Lumirror E-60: Toray Industries, Inc.) and a 75 μm transparent polyester film C (Cosmo Shine A4300: Toyobo Co., Ltd.) are bonded to the other surface and irradiated with ultraviolet rays from the transparent polyester film C side. Thus, a laminated plate was produced.

<Adhesive layer coating solution S2>
・ Ionizing radiation curable resin 30 parts (NK Oligo U-200PA: Shin-Nakamura Chemical Co., Ltd.)
・ Photo cationic polymerizable oligomer 30 parts (Aronix M-6100: Toagosei Co., Ltd.)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

  Subsequently, barium sulfate (B-55: Sakai Chemical Industry Co., Ltd.) and titanium dioxide (Tai Pure R-700: DuPont Co., Ltd.) are mixed with urethane resin (Adekabon titer U-500: Asahi Denka Kogyo Co., Ltd.) in a weight ratio. Barium: titanium dioxide: resin = 21: 9: 5 was dispersed to prepare a white resin layer coating. This paint was applied to the surface (outermost surface) of the foamed white polyester film B and the transparent polyether film C located on the outermost surface of the laminate so that the dry coating thickness was 50 μm on one side, and the white resin layer (light reflecting layer) A functional laminate of Example 11 having a functional layer) was produced.

[Example 12] (Light reflecting layer / metal)
An adhesive layer coating solution S3 having the following composition is applied to the surface of a transparent polyester film A (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm by a bar coating method so that the thickness becomes 10 μm. A 75 μm foam white polyester film B (Lumirror E-60: Toray Industries, Inc.) and a 75 μm transparent polyester film C (Cosmo Shine A4300: Toyobo Co., Ltd.) are bonded to the other surface and irradiated with ultraviolet rays from the transparent polyester film C side. A laminated plate was produced.

<Adhesive layer coating solution S3>
・ Ionizing radiation curable resin 30 parts (KAYARAD R-115: Nippon Kayaku)
・ Ionizing radiation curable resin 30 parts (Aronix M-6100: Toagosei Co., Ltd.)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

Next, an aluminum layer having a thickness of 12 nm is formed on one surface of the transparent polyester film C of the laminate by sputtering under vacuum (5 × 10 −5 torr) to form a metal layer (light reflection functional layer). Then, the functional laminate of Example 12 was produced.

[Example 13] (Anti-fogging function)
Instead of the polyester film having the hard coat layer of Example 10, a polyester film having an antifogging layer was used, and the same procedure as in Example 10 was performed except that the adhesive layer coating solution was replaced with the following adhesive layer coating solution S4. The functional laminate of Example 13 was produced. A polyester film having an anti-fogging layer is coated on one side of a polyester film (Cosmo Shine A4300: Toyobo Co., Ltd.), dried so that the thickness after drying of the hydrophilic layer coating solution is 20 μm, the high-pressure mercury lamp was irradiated with ultraviolet rays to form a hydrophilic layer, on the hydrophilic layer, the surface protective layer coating solution 18 g / m 2 coating of the following formulation, dried by forming a surface protective layer Produced.

<Hydrophilic layer coating solution>
・ 20 parts of ethylene oxide-modified diacrylate (New Frontier PE-600: Daiichi Kogyo Seiyaku Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)
・ Ethanol 4 parts

<Surface protective layer coating solution>
・ Tetraethoxysilane 20 parts (tetraethyl orthosilicate: Wako Pure Chemical Industries, Ltd.)
・ 3 parts of acetylene glycol (Surfinol 465: Air Products)
-Ethanol 20 parts-0.01 N hydrochloric acid aqueous solution 5 parts The above is mixed and stirred at room temperature for 10 hours, and then used as a coating solution.

<Adhesive layer coating solution S4>
・ Ionizing radiation curable resin 60 parts (KAYARAD R-115: Nippon Kayaku)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 14]
A functional laminate of Example 14 was prepared in the same manner as Example 10 except that the transparent polyester film A and the transparent polyester film B were both changed to a polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.). .

[Example 15]
A functional laminate of Example 15 was produced in the same manner as in Example 10 except that the transparent polyester film A and the transparent polyester film B were both changed to a 100 μm thick polyester film (Cosmo Shine A4300: Toyobo Co., Ltd.). .

[Example 16]
A polyester film having an antireflection layer was produced in the same manner as in Example 10 except that a transparent polyester film C (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm was used instead of the transparent polyester film A. Next, an adhesive layer coating solution S1 similar to that in Example 10 was applied to one surface of a transparent polyester film D (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm by a bar coating method so as to have a thickness of 10 μm. The transparent polyester film C was bonded to the surface opposite to the antireflection layer.

  Next, a transparent polyester film having a hard coat layer was produced in the same manner as in Example 10 on one surface of a transparent polyester film E (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm. Next, on the surface opposite to the hard coat layer, the adhesive layer coating solution S1 of Example 10 was applied by a bar coating method so as to have a thickness of 10 μm, and hard coat layer / film E / adhesive layer / film D / adhesion. The adhesive laminate was cured by bonding and ultraviolet irradiation so as to be layer / film C / antireflection layer, and a functional laminate of Example 16 was produced.

[Example 17]
A functional laminate of Example 17 was produced in the same manner as in Example 16 except that the transparent polyester film D was changed to a transparent polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

[Example 18]
The functional laminate of Example 18 was changed in the same manner as in Example 10 except that the adhesive layer coating solution was replaced with the following adhesive layer coating solution S5, the adhesive layer coating solution was applied and dried, and then bonded and UV-irradiated. A plate was made.
<Adhesive layer coating solution S5>
・ 90 parts of thermosetting resin (Takelac A-606: Mitsui Chemicals)
・ 10 parts of curing agent (Takenate A-50: Mitsui Chemicals)
・ Diluted solvent 146 parts

[Comparative Example 7]
A functional laminate of Comparative Example 7 was produced in the same manner as in Example 10 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S6.
<Adhesive layer coating solution S6>
・ Ionizing radiation curable resin 50 parts (KAYARAD R-115: Nippon Kayaku)
・ Ionizing radiation curable resin 30 parts (NK Ester A-TMM-3N: Shin-Nakamura Chemical Co., Ltd.)
・ 20 parts of cationic photopolymerizable monomer (ACMO: Kojinsha)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 8]
A functional laminate of Comparative Example 8 was produced in the same manner as in Example 10 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S7.
<Adhesive layer coating solution S7>
・ Ionizing radiation curable resin 100 parts (NK Oligo U-15HA: Shin-Nakamura Chemical Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 9]
A functional laminate of Comparative Example 9 was produced in the same manner as in Example 10 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S8.
<Adhesive layer coating solution S8>
・ Ionizing radiation curable resin 100 parts (NK Ester A-TMM-3N: Shin-Nakamura Chemical Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 10]
A functional laminate S9 of Comparative Example 10 was produced in the same manner as in Example 10 except that the adhesive layer coating solution was changed to the following intermediate layer coating solution S9.
<Intermediate layer coating solution>
・ 90 parts of ionizing radiation curable resin (NK Oligo U15-HA: Shin-Nakamura Chemical Co., Ltd.)
・ Butyl acrylate 10 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 11]
An antireflection layer having a thickness of 0.2 μm was formed on one surface of a transparent polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.) as in Example 10. Next, on the surface opposite to the antireflection layer, a hard coat layer similar to that in Example 10 was applied by a bar coating method so as to have a thickness of 5 μm, and irradiated with ultraviolet rays to produce a functional film of Comparative Example 11. did.

[Comparative Example 12]
A functional film of Comparative Example 12 was produced in the same manner as Comparative Example 11 except that the transparent polyester film was changed to a transparent polyester film having a thickness of 188 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

(1) Martens Hardness The adhesive layer coating solutions S1 to S9 of Examples 10 to 18 and Comparative Examples 7 to 12 are applied to a transparent polyester film F (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm so that the thickness becomes 10 μm. Was applied by a bar coating method. A release film is bonded onto the adhesive layer, irradiated with ultraviolet rays (irradiation amount: 1000 mJ), the adhesive layer is cured, the release film is peeled off from the adhesive layer, and the hardness of the surface of the adhesive layer after curing is cured. Was measured in the same manner as in Examples 1-9. The results are shown in Table 2.

About the functional laminated board and functional film which were obtained by Examples 10-18 and Comparative Examples 7-12, the measurement and evaluation of the following item were performed similarly to Examples 1-9. The results are shown in Table 2.
(2) Processability (peeling / floating): as in Examples 1 to 9 (3) Adhesive The uppermost polyester film on which the functional layer is formed and the other members constituting the laminate are peeled off, The adhesiveness during that time was measured and evaluated in the same manner as in Examples 1-9.
(4) Waist: Same as Examples 1-9

As is clear from the above results, the functional laminates of Examples 10 to 18 have a Martens hardness of 260 N / mm 2 or less, and therefore prevent floating and peeling when performing a die cutting process. I was able to. In particular, in the functional laminates of Examples 10 to 14 and Example 18, the thickness of the plastic film + adhesive layer was in the range of 250 μm to 700 μm, and the waist was sufficient.

  In the functional laminate of Example 10, the adhesive strength of the adhesive layer was 15 N / 25 mm width or more. For this reason, after performing the die cutting process, the two plastic films cannot be peeled off and are particularly firmly bonded.

  In the functional laminate of Example 15, the thickness of the plastic film + adhesive layer is thinner than that of Example 10. Since the total thickness (210 μm) is relatively thin, the functional laminate of Example 15 was slightly bent when touched with a finger, but the waist strength was one piece of plastic thicker than that (Comparative Example) 11: 250 μm), indicating that it is stronger than one plastic film having the same thickness.

  In the functional laminates of Examples 16 and 17, the thickness of the plastic film + adhesive layer is thicker than that of Example 10. Because of the thick thickness, the waist was very sufficient. However, since the total thickness was thick, a large force was required for die cutting as compared with the functional laminates of Examples 10 to 15.

On the other hand, since the functional laminates of Comparative Examples 7 to 9 had a Martens hardness of greater than 260 N / mm 2 , floating or peeling occurred when the die cutting process was performed.

In the functional laminate of Comparative Example 10, the Martens hardness of the intermediate layer provided in place of the adhesive layer was greater than 260 N / mm 2 , and the adhesive strength of the two plastic films was less than 10 N / 25 mm width. For this reason, since the adhesiveness between the plastic film and the adhesive layer was poor and the plastic film was easily peeled off, the repulsive force of the plastic film could not be suppressed during the punching process, and floating or peeling occurred.

  The functional films of Comparative Examples 11 and 12 are obtained by providing an antireflection layer and a hard coat layer on a single plastic film. Since two or more plastic films were not laminated and the thickness of the plastic film was thin, sufficient waist was not obtained.

3. Transparent conductive laminate (third aspect)

3.1 Production of transparent substrate (transparent laminate or transparent film) [Example 19]
On a transparent polyester film A (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm, a hard coat layer coating solution having the following composition was applied by a bar coating method so as to have a thickness of 5 μm, and hard coated by ultraviolet irradiation. A transparent polyester film having a layer was prepared.

<Hard coat layer coating solution>
・ 58 parts of ionizing radiation curable resin (Diabeam UR6530: Mitsubishi Rayon)
・ 1.8 parts of photopolymerization initiator (Irgacure 651: Ciba Japan)
・ Methyl ethyl ketone 80 parts ・ Toluene 60 parts ・ Ethyl cellosolve 7 parts

Next, an adhesive layer coating solution S1 having the following composition was applied on the surface of the transparent polyester film A opposite to the hard coat layer by a bar coating method so as to have a thickness of 10 μm. Next, a transparent poster film B (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm was bonded onto the adhesive layer and irradiated with ultraviolet rays to obtain a transparent laminate a.
<Adhesive layer coating solution S1>
・ Ionizing radiation curable resin 60 parts (NK Oligo U-200PA: Shin-Nakamura Chemical Co., Ltd.)
・ Hydroxyethyl methacrylate 35 parts ・ 2-hydroxyethyl acrylate 5 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 20]
A transparent laminate b was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S2.
<Adhesive layer coating solution S2>
・ Ionizing radiation curable resin 30 parts (NK Oligo U-200PA: Shin-Nakamura Chemical Co., Ltd.)
・ Ionizing radiation curable resin 30 parts (Aronix M-6100: Toagosei Co., Ltd.)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 21]
A transparent laminate c was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S3.
<Adhesive layer coating solution S3>
・ Ionizing radiation curable resin 30 parts (KAYARAD R-115: Nippon Kayaku)
・ Ionizing radiation curable resin 30 parts (Aronix M-6100: Toagosei Co., Ltd.)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 22]
A transparent laminate d was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S4.
<Adhesive layer coating solution S4>
・ Ionizing radiation curable resin 60 parts (KAYARAD R-115: Nippon Kayaku)
・ Hydroxyethyl methacrylate 40 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Example 23]
A transparent laminate e was obtained in the same manner as in Example 19 except that the transparent polyester film A and the transparent polyester film B were both changed to a polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

[Example 24]
A transparent laminate f was obtained in the same manner as in Example 19 except that the transparent polyester film A and the transparent polyester film B were both changed to a 100 μm thick polyester film (Cosmo Shine A4300: Toyobo Co., Ltd.).

[Example 25]
A polyester film having a hard coat layer was produced in the same manner as in Example 19 by using a transparent polyester film C (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm instead of the transparent polyester film A. Next, the same adhesive layer coating solution S1 as in Example 19 was applied to the surface of the polyester film opposite to the hard coat layer and one surface of the transparent polyester film D (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm. Were applied by a bar coating method so as to have a thickness of 10 μm, and two adhesive films were obtained. Next, the obtained two adhesive films and a transparent polyester film E (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 250 μm were combined with a hard coat layer / film C / adhesive layer / film D / adhesive layer / film E. Then, the adhesive layer was cured by irradiating with ultraviolet rays to obtain a transparent laminate g.

[Example 26]
A transparent laminate h was obtained in the same manner as in Example 25 except that the transparent polyester film D was changed to a transparent polyester film having a thickness of 250 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

[Example 27]
The transparent laminate of Example 27, except that the adhesive layer coating solution was replaced with the following adhesive layer coating solution S5, the adhesive layer coating solution was applied and dried, then bonded and not irradiated with ultraviolet light. i was obtained.
<Adhesive layer coating solution S5>
・ 90 parts of thermosetting resin (Takelac A-606: Mitsui Chemicals)
・ 10 parts of curing agent (Takenate A-50: Mitsui Chemicals)
・ Diluted solvent 146 parts

[Comparative Example 13]
A transparent laminate j was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S6.
<Adhesive layer coating solution S6>
・ Ionizing radiation curable resin 50 parts (KAYARAD R-115: Nippon Kayaku)
・ Ionizing radiation curable resin 30 parts (NK Ester A-TMM-3N: Shin-Nakamura Chemical Co., Ltd.)
・ 20 parts of photopolymerizable monomer (ACMO: Kojinsha)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 14]
A transparent laminate k was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S7.
<Adhesive layer coating solution S7>
・ Ionizing radiation curable resin 100 parts (NK Oligo U-15HA: Shin-Nakamura Chemical Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 15]
A transparent laminate 1 was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following adhesive layer coating solution S8.
<Adhesive layer coating solution S8>
・ Ionizing radiation curable resin 100 parts (NK Ester A-TMM-3N: Shin-Nakamura Chemical Co., Ltd.)
・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 16]
A transparent laminate m was obtained in the same manner as in Example 19 except that the adhesive layer coating solution was changed to the following intermediate layer coating solution S9.
<Intermediate layer coating solution S9>
・ 90 parts of ionizing radiation curable resin (NK Oligo U15-HA: Shin-Nakamura Chemical Co., Ltd.)
・ Butyl acrylate 10 parts ・ Photopolymerization initiator 5 parts (Irgacure 184: Ciba Japan)

[Comparative Example 17]
On one side of a 250 μm thick transparent polyester film (Cosmo Shine A4300: Toyobo Co., Ltd.), a hard coat layer coating solution having the following composition was applied by a bar coating method so as to have a thickness of 5 μm, and then irradiated with ultraviolet rays. A transparent film n was obtained.
<Hard coat layer coating solution>
・ 58 parts of ionizing radiation curable resin (Diabeam UR6530: Mitsubishi Rayon)
・ 1.8 parts of photopolymerization initiator (Irgacure 651: Ciba Japan)
・ Methyl ethyl ketone 80 parts ・ Toluene 60 parts ・ Ethyl cellosolve 7 parts

[Comparative Example 18]
A transparent film o was obtained in the same manner as in Comparative Example 17 except that the transparent polyester film was changed to a transparent polyester film having a thickness of 188 μm (Cosmo Shine A4300: Toyobo Co., Ltd.).

3.2 Formation of transparent conductive layer Indium tin oxide (ITO) with a thickness of about 400Ω on the surface of the laminates a to m and the films n and o (the side where the hard coat layer is not formed) The transparent conductive layer which consists of was formed using sputtering method, and the transparent conductive film for touchscreens of Examples 19-27 and Comparative Examples 13-16, and the transparent conductive film for touchscreens of Comparative Examples 17 and 18 were obtained. .

(1) Martens hardness The adhesive layer coating liquids S1 to S9 of Examples 19 to 27 and Comparative Examples 13 to 16 are applied to a transparent polyester film F (Cosmo Shine A4300: Toyobo Co., Ltd.) having a thickness of 188 μm so that the thickness becomes 10 μm. Was applied by a bar coating method. A release film is bonded onto the adhesive layer, irradiated with ultraviolet rays (irradiation amount: 1000 mJ), the adhesive layer is cured, the release film is peeled off from the adhesive layer, and the hardness of the surface of the adhesive layer after curing is cured. Was measured in the same manner as in Examples 1-9. The results are shown in Table 3.

  About the transparent conductive laminate for touch panels of Examples 19 to 27 and Comparative Examples 13 to 16, and the transparent conductive films for touch panels of Comparative Examples 17 and 18, the measurement and evaluation of the following items were conducted in the same manner as in Examples 1 to 9. Went. The results are shown in Table 3.

(2) Processability (peeling / floating): as in Examples 1 to 9 (3) Adhesiveness Polyester film having a hard coat layer of a transparent conductive laminate for touch panels, and other members constituting the laminate Was peeled off, and the adhesion between them was measured and evaluated in the same manner as in Examples 1-9.
(4) Waist: Same as Examples 1-9

As is clear from the above results, the transparent conductive laminates for touch panels of Examples 19 to 27 have a Martens hardness of 260 N / mm 2 or less, so that they do not float or peel off when the die cutting process is performed. Could be prevented. In particular, in the transparent conductive laminates for touch panels of Examples 19 to 23 and Example 27, the thickness of the plastic film + adhesive layer was in the range of 250 μm to 700 μm, and the waist was sufficient.

  In the transparent conductive laminate for touch panel of Example 19, the adhesive strength of the adhesive layer was 15 N / 25 mm width or more. For this reason, after performing the die cutting process, the two plastic films cannot be peeled off and are particularly firmly bonded.

  In the transparent conductive laminate for touch panel of Example 24, the thickness of the plastic film + adhesive layer is thinner than that of Example 19. Since the total thickness (210 μm) is relatively thin, the transparent conductive laminate for touch panel of Example 24 was slightly bent when touched with a finger, but the waist strength was one thicker plastic. (Comparative Example 17: 250 μm) It was shown that the waist was stronger than one plastic film having the same thickness.

  In addition, the transparent conductive laminates for touch panels of Examples 25 and 26 are thicker than those of Example 19 in the thickness of the plastic film + adhesive layer. Because of the thick thickness, the waist was very sufficient. However, since the total thickness was thick, a large force was required for die cutting as compared with the transparent conductive laminates for touch panels of Examples 19 to 24.

On the other hand, the transparent conductive laminates for touch panels of Comparative Examples 13 to 15 had a Martens hardness larger than 260 N / mm 2 , so that floating or peeling occurred when the die cutting process was performed.

In the transparent conductive laminate for touch panel of Comparative Example 16, the Martens hardness of the intermediate layer provided in place of the adhesive layer is larger than 260 N / mm 2 , and the adhesive strength of the two plastic films is less than 10 N / 25 mm width. there were. For this reason, since the adhesiveness between the plastic film and the adhesive layer was poor and the plastic film was easily peeled off, the repulsive force of the plastic film could not be suppressed during the punching process, and floating or peeling occurred.

  The functional films of Comparative Examples 17 and 18 are obtained by providing a heat ray reflective layer and a hard coat layer on one plastic film. Since two or more plastic films were not laminated and the thickness of the plastic film was thin, sufficient waist was not obtained.

4). Production of Touch Panels The transparent conductive laminates for touch panels of Examples 19 to 26 and Comparative Examples 13 to 16 and the transparent conductive films for touch panels of Comparative Examples 17 and 18 were incorporated as upper electrodes of commercially available resistive touch panels, A resistive touch panel was produced. Although the obtained touch panel was light, it had a waist and a feeling of pressing (touched touch), and there was no fear of glass scattering during handling.

DESCRIPTION OF SYMBOLS 1 ... Functional laminated board 2 ... Transparent conductive layer 3 ... Insulating layer 4 ... Protective layer 5 ... Electromagnetic wave shield layer 6 ... Transparent conductive laminated board 7 ... Touch panel drawer Electrode wire 8 ... Spacer 9 ... Hard coat layer 10 ... Transparent laminate 11 ... Plastic film 12 ... Adhesive layer 13 ... Functional layer 20 ... Touch panel

Claims (13)

  1. At least two or more plastic films are laminated through an adhesive layer, and the laminated film is provided with a functional layer on at least one side or both sides of the plastic film, the Martens hardness of the adhesive layer being A functional laminate having 260 N / mm 2 or less.
  2. A laminated plate obtained by bonding at least two or more plastic films through an adhesive layer, and having a functional layer at least one between the plastic film and the Martens hardness of the adhesive layer Is a functional laminate having 260 N / mm 2 or less.
  3.   The functional laminate according to claim 2, wherein the functional layer has a function selected from an electromagnetic wave shielding function, a heat ray reflecting function, a gas barrier function, and a planar heat generating function.
  4. A laminated plate obtained by bonding at least two plastic films through an adhesive layer, having a functional layer on at least one surface of the outermost plastic film, and having a Martens hardness of 260 N A functional laminate having a thickness of / mm 2 or less.
  5.   The functional laminate according to claim 4, wherein the functional layer has a function selected from a light reflection function, a light transmission adjustment function, and an antifogging function.
  6.   6. The functional laminate according to claim 1, wherein the combined thickness of the plastic film and the adhesive layer is 200 to 700 μm, and the thickness of each plastic film is 50 to 400 μm.
  7.   The functional laminate according to any one of claims 1 to 6, wherein the resin constituting the adhesive layer contains a thermosetting resin or an ionizing radiation curable resin.
  8.   The functional laminate according to claim 1, wherein the adhesive layer also serves as a functional layer.
  9. A transparent for a touch panel, comprising a transparent conductive layer on at least one surface of a transparent laminate obtained by bonding at least two transparent plastic films with an adhesive layer having a Martens hardness of 260 N / mm 2 or less. Conductive laminate.
  10.   The transparent conductive laminate for a touch panel according to claim 9, wherein the combined thickness of the transparent plastic film and the adhesive layer is 200 to 700 μm, and the thickness of each plastic film is 50 to 400 μm.
  11.   The transparent conductive laminate for a touch panel according to claim 9 or 10, wherein the resin constituting the adhesive layer contains a thermosetting resin or an ionizing radiation curable resin.
  12. In the capacitive touch panel provided with a transparent conductive substrate having a transparent conductive layer on at least one side of the transparent substrate, the transparent substrate has at least two transparent plastic films with a Martens hardness of 260 N / A capacitive touch panel characterized by being a transparent laminated plate bonded with an adhesive layer of mm 2 or less.
  13. An upper electrode having a transparent conductive layer on a transparent substrate and a lower electrode having a transparent conductive layer on a transparent substrate are arranged with a spacer so that the transparent conductive layers face each other. In the resistive film type touch panel, the transparent base material of the upper electrode and / or the transparent base material of the lower electrode is bonded to at least two plastic films with an adhesive layer having a Martens hardness of 260 N / mm 2 or less. A resistive film type touch panel, characterized by being a transparent laminated board.
JP2012503098A 2010-03-04 2011-02-24 Functional laminate, transparent conductive laminate for touch panel, and touch panel using the same Active JP5838152B2 (en)

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JP2010047257 2010-03-04
PCT/JP2011/054151 WO2011108438A1 (en) 2010-03-04 2011-02-24 Functional laminated sheet, and transparent electrically conductive laminated sheet for touch panel and touch panel produced using same
JP2012503098A JP5838152B2 (en) 2010-03-04 2011-02-24 Functional laminate, transparent conductive laminate for touch panel, and touch panel using the same

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US20130063393A1 (en) 2013-03-14
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TW201139152A (en) 2011-11-16

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